# Undertale Game Devlog

**URL:** <https://forum.makecode.com/t/undertale-game-devlog/41456>\
**Category:** Arcade\
**Created:** [January 9, 2026, 11:51pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456 "2026-01-09T23:51:47Z")\
**Posts on this page:** 11\
**Page:** 1

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**Author:** ![moopmakers](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/moopmakers/32/31257_2.png) [@moopmakers](https://forum.makecode.com/u/moopmakers)\
**Post date:** [January 9, 2026, 11:51pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/1 "2026-01-09T23:51:47Z")

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I’m making a game in GameMaker, and I will be making a port to Makecode Arcade. I’m gonna keep a log about the progress of both here.

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**Author:** ![redSprite](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/redsprite/32/34262_2.png) [@redSprite](https://forum.makecode.com/u/redSprite)\
**Post date:** [January 10, 2026, 4:41am UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/2 "2026-01-10T04:41:21Z")

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Uhm  
You sure GameMaker will translate that easily to MakeCode arcade?

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**Author:** ![Danny\_Devention](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/danny_devention/32/30134_2.png) [@Danny\_Devention](https://forum.makecode.com/u/Danny_Devention)\
**Post date:** [January 10, 2026, 4:41am UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/3 "2026-01-10T04:41:58Z")

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Wait what do you mean by “Undertale”? Is it a Fan Game or what?

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**Author:** ![moopmakers](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/moopmakers/32/31257_2.png) [@moopmakers](https://forum.makecode.com/u/moopmakers)\
**Post date:** [January 12, 2026, 6:20pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/4 "2026-01-12T18:20:18Z")

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Yea, It’s basically a fan game.

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**Author:** ![moopmakers](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/moopmakers/32/31257_2.png) [@moopmakers](https://forum.makecode.com/u/moopmakers)\
**Post date:** [January 12, 2026, 6:20pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/5 "2026-01-12T18:20:24Z")

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Well, It’s like Sonic 1 for the Master System. It’ll be a different game, but the spritework will remain the same. I’m just making an adapted version for Makecode Arcade.

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**Author:** ![moopmakers](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/moopmakers/32/31257_2.png) [@moopmakers](https://forum.makecode.com/u/moopmakers)\
**Post date:** [January 28, 2026, 10:15pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/6 "2026-01-28T22:15:19Z")

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I’ve made a working test, and I’ll use this engine for now.

> **[Deltarune Jake TEST](https://arcade.makecode.com/S76181-70770-03048-12558)**
>
> Made with ❤️ in Microsoft MakeCode Arcade.

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**Author:** ![Danny\_Devention](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/danny_devention/32/30134_2.png) [@Danny\_Devention](https://forum.makecode.com/u/Danny_Devention)\
**Post date:** [January 29, 2026, 2:48am UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/7 "2026-01-29T02:48:12Z")

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Some extensions I would suggest using for this:

- Arcade Story Extension (For cutscenes)
- Arcade Mini-Menu Extension (For menus)

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**Author:** ![moopmakers](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/moopmakers/32/31257_2.png) [@moopmakers](https://forum.makecode.com/u/moopmakers)\
**Post date:** [January 29, 2026, 5:12pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/8 "2026-01-29T17:12:38Z")

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I am already using the Mini-Menu Extension. I will get the story extension though!

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**Author:** ![moopmakers](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/moopmakers/32/31257_2.png) [@moopmakers](https://forum.makecode.com/u/moopmakers)\
**Post date:** [January 29, 2026, 5:15pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/9 "2026-01-29T17:15:19Z")

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I’ve implemented saving.

> **[Deltarune Jake TEST](https://arcade.makecode.com/S76181-70770-03048-12558)**
>
> Made with ❤️ in Microsoft MakeCode Arcade.

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**Author:** ![aRandomCoder130](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/arandomcoder130/32/34123_2.png) [@aRandomCoder130](https://forum.makecode.com/u/aRandomCoder130)\
**Post date:** [August 6, 2026, 3:54pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/10 "2026-08-06T15:54:45Z")

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mayb u can use my extension or smth cuz i just added an undertale mode in it

it’s very laggy tho so agree to disagree

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**Author:** ![thegay1](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/thegay1/32/35330_2.png) [@thegay1](https://forum.makecode.com/u/thegay1)\
**Post date:** [September 17, 2026, 9:48pm UTC](https://forum.makecode.com/t/undertale-game-devlog/41456/11 "2026-09-17T21:48:23Z")

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what extensions did u use?
